Equivalent Hydraulic Conductivity of Heterogeneous Aquifers Estimated by Multi-Frequency Oscillatory Pumping

Aquifers are a vital part of our water cycle and modeling groundwater flow is paramount for number environmental applications. Modeling requires the estimation aquifer properties, which mostly achieved by field pumping tests. Oscillatory tests involve repeated injection water, generates periodic head signal. We investigate equivalent hydraulic conductivity (Keq) in an oscillatory test with multi-frequency excitation. Synthetic data generated from numerical simulations heterogeneous aquifers inverse method applied to estimate Keq. The involves Fast Fourier Transform (FFT) analysis obtaining spatial distribution amplitude then matching amplitudes using semi-analytical solution homogeneous dependence Keq on frequency view previous literature, has found increasing values higher frequencies. did not find this increase minor variations were observed appear be result error. implies that can used without any corrections dependence.